Content introduction: A sudden call from his university tutor made Wu Xie reluctantly join this journey. The mentor who had something to hide, the woman who knew Wu Xie well, the nervous Taoist priest, and a group of four people including Wu Xie started from Shanghai and moved along the 30° north latitude. Strange things happened one after another along the way, and finally arrived in Derge. Just when Wu Xie was about to succeed and retire, his mentor suddenly died suddenly and the Taoist priest disappeared. The woman led out a man Wu Xie was very familiar with but unexpected... What was the original intention of this journey? Who is the real initiator? Who is that man and what is his relationship with the woman? And why did that woman approach Wu Xie?
"When you set up a trap, have you ever thought that you are also in someone else's trap?"
"Actually, you know very well that what is out of reach is not ten years from now, but before today."